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C. B. GRAY;

MACHINE FOR CUTTING SHEET FORM, MATERIAL.

APPLICATION FILED NOV. 21, 191B. RENEWED JUNE 25. 1920.

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MACHINE FOR CUTTING SHEET FORM MATERIAL.

APPLICATION FILED NOV. 21, I918. RENEWD JUNE 25.1920. 1,366,790.

Patented Jan.25,1921.

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APPLICATION FILED NOV. 21, I918. RENEWED JUNE 25,1920- Patented Jan. 25,1921.

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MACHINE FOR CUTTING SHEET FORM MATERIAL.

APPLICATION FILED NOV. 21, I918. RENEWED JUNE 25. I920.

1,866,790. Patented Jan; 25, 1921.

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MACHINE FOR CUTTING SHEET FORM MATERIAL.

APPLICATION FILED NOV. 2|, 191s. RENEWED JUNE 25. 1920.

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C. B. GRAY.

MACHINE FOR CUTTING SHEET FORM MATERIAL.

APPLICATTON FILED NOV. 21, I918. RENEWED JUNE 25, 1920.

1,366,790. Patented Jan. 25, 1921.

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MACHINE FOR CUTTING SHEET'FORM MATERIAL.

APPLICATION FILED NOV. 2|, I9lB. RENEWED JUNE 25, 1920- 1,366,790.Patented Jan. 25,1921.

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MACHINE FOR CUTTING SHEET FORM MATERIAL.

APPLICATION man NOV. 21, 1918. RENEWED JUNE 25. 1920.

1,366,790. a Patented Jan. 25, 1921.

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MACHINE FOR CUTTING SHEET FORM MATERIAL.

APPLICATION man NOV. 21. 191B. RENEWED Jun; 25. 1920.

1,366,790. Patented Jan. 25, 1921.

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MACHINE FOR cumms SHEET FORM MATERIAL.

I APPLICATION FILED NOV. 2|, I918- RENEWED JUNE 25, 1920. 1,366,790.

Patented Jan. 25, 1921.

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MACHINE FOR CUTTING SHEET FORM MATERIAL.

APPLICATION FILED NOV. 21, I918. RENEWED JUNE 25. 1920.

1,366,790. I Patented 'Jan. 25, 1921.

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v UNITED STATES CHARLES BAX'IER GRAY, OI KNOXVILLE, TENNESSEE.

MACHINE FOR CUTTING SHEET-FORM MATERIAL.

Specification of Letters Patent.

Patented Jan. 25, 1921.

Application filed November 21, 1918, Serial No. 263,555. Renewed June25, 1920. Serial No. 391,837.

To all whom it may concern:

Be it known that 1, CHARLES BAx'mn GRAY, a citizen of the United States,residing at Knoxville, in the county of Knox and State of Tennessee,have invented a new A and useful Improvement in Machines for CuttingSheet-Form Material, of which the followmg is a specification, referencebeing had to the accompanying drawing.

This improvement relates particularly to machines for makingstep-by-step cuts in a sheet, pieces of equal width being cut out ateach step and this resulting in forming a slot of indefinite length andas wide as the Width of the pieces which are cut out. The cuttingmechanism comprises a reciprocatory cutter bar located at one side ofthe sheet plane and adapted to work in opposition to cutting memberslocated at the opposite side of the sheet plane, the reciprocatorycutter penetrating the sheet during each downward stroke andconstituting the active or dominating member of the cutting mechanism.

The object of this invention is to provide a form of mechanism forfeeding the sheet step-by-step between strokes of the reciprocatorycutting member, such feed mechanism comprising feed members located atopposite sides of the sheet plane. A further object of the invention isto provide power-actuated means for turning the feed mechanism on anupright axis, whereby the direction of feed is changed, saidpoweractuated mechanism being under the control of the operator.

The machine comprises agroup of cutting members and feed mechanismlocated below the-sheet plane and supported on a bod which is rotatableon an upright axis whic is in approximate alinement with thereciprocatory upper cutter. The machine further comprises a turret bodylocated above the sheet plane and rotatable on the abovementioned axialline and forming a guide for an upright reciprocatory member located onsaid axial line and rotatable in unison with said turret body which sup-)orts the upper cutter so as to compel the latter to rotate in unisonwith the turret body. Said turret body also supports feed mechanism.adapted to cohperate with the lower feed mechanism for feeding the sheetbetween strokes of the reciprocatory cutter. With said feed mechanismlocated above the sheet plane is associated poweractuated andoperator-controlled means for raismg sa1d part of the feed mechanism outof enga ement with the sheet, a spring be 7 ng app led to sa1d feedmechanism to yieldingly press downward in opposition to saidpower-actuated means.

W1th the upper turret orvrotatable body is associated power-actuated andoperatorcontrolled means for turning said bodies on turning carrying thefeed members in an orbital path which is concentric with the turretaxis. This change of direction of action of the feed mechanism changesthe direction in which the sheet is fed without changing the position ofthe sheet in the sheet plane by the operator. When the tur rets arestationary, the direction of feeding of the sheet efiected by thefeeding mechanism is varied by manually turning said sheet in ahorizontal plane (the sheet plane) on said upright axial line.

While, as above stated, power-actuated operator-controlled means areprovided for turning the upper turret, provision is also made formanually turning said turret. By using the power-actuated means for thispurpose, the turret can be turned in less time than would be re uiredfor turning said turret manually. t is intended that the manual meansfor turning said turret will be used when said turret is to be turnedthrough only a small part of a rotation, and that the power-actuatedmeans will be used when the rotation of the turret is to be through aconsiderable part of a full rotation. Furthermore, when a machine ismade large for the cutting of thick sheets, a relatively large amount ofpower will be re quired for turning said turret. and then it may bedesirable to use the power-actuated means for turning the turret througheven a small part of a full rotation.

In the accompanying drawings,

Figure 1 is a front elevation of a machine embodying my improvement;

Fig. 2 is an end elevation looking toward the right;

Fig. 3 is an end elevation looking toward the left;

Fig. 4 is a rear elevation;

Fig. 5 is a plan of the machine; F igs. 5 and 5 are details oftransmission mechanism shown in Fig. 5;

Fig. 6 is a horizontal section through the coupling member in which thehead of the reciprocatory cutter is supported;

Fig. 7 is an upright section on the line, 77, of Figs. 1, 2 and 8;

Fig. 8 is an upright section on the line, 8--8, of Fig. 7, lookingtoward the right;

Fig. 9 is a horizontal section on the line, 9-9, of Figs. 1, 7 and 8,the upper cutter having been extended downward through the sheet plane;v

Fig. 10 is a section on the line, 10-10, of Fig. 9, looking in thedirection of the arrow, only the bar supporting the lower cutters beingshown;

Fig. 11 is a horizontal section on the line, 1111, of Fig. 10;

Fig. 12 is a perspective of the chair which supports the lower cutters,a part being broken away;

F ig. 13 is a front elevation of said chair, portions being broken awayand the cutters being applied;

Fig. 14: is an elevation of said chair, looking toward the left, partsbeing broken away; Fig. 15 is an upright section on the line 1515, ofFigs. 9 and 10, looking toward the right;

Fig. 16 is an elevation of one of the lower cutter bars, looking towardthe right;

Fig. 17 is a plan of pawl and ratchet mechanism for transmitting to thelower cutter wheel a step-by-step motion, the bar supporting the lowercutters having been removed; v Fig. 18 is an upright section on theline, 1818, of Fig. 17 looking in the direction of the arrow;

Fig. 19 is an elevation of the mechanism shown by Fig. 17, the viewbeing in the direction of the arrow in Fig. 17;

Fig. 20 is an upright section on the line, 2020, of Fig. 17, lookingtoward the left;

Fig. 21 is a horizontal section on the line, 2121, of Figs. 7 and 8;

Fig. 22 is a horizontal section on the line,

2222, of Figs. 1 and 7;

Fig. 23 is an upright section on the line, 2323, of Fig. 4:, lookingtoward the left;

F ig. 24 is a sectional detail of the upper presser;

Fig. 25 is a horizontal section on the line, 25-25, of Figs. 1 and 7;

Fig. 26 is a sectional detail plan of strap ad'ustin mechanism shown inFig. 25;

ig. 2% is a section on the line, 27-27, of Fi 26, looking toward theright.

Refhrring to said drawings, A is the body of the machine. This has anupper llOIlzontal arm, A and a lower horizontal arm, A and a base, A.

Between said arms is the throat of the machine. On the left of the arm,A, is an upright hearing, A in which rests the tubular lower turret, B,on the upper end of which is a circular head, B Said head rests in anenlargement, A of said bearing and the upper face of the head is flushwith the upper end of said bearing. On said head is seated the base of achair, B saidbase being circular in horizontal cross-section and of thesame diameter as said head. A cylindrical tubular neck, Bi, rises on thehead, B on the axial line of said head and enters a socket, B formed inthe lower face of the chair, B Studs, B rising from the head, B entercorresponding sockets, 6 (Figs. 1, 13 and 15) in the lower face of thebase of the chair, B By this means engagement is made between saidturret and said chair, whereby said chair is compelled to turn in unisonwith the turret, B, when the latter turns on its upright axis in theupright bearing, A.

A drum, B, surrounds the lower end of the turret, B, and is keyedthereto. Said drum has two circumferential grooves or channels each ofwhich is adapted to receive a strap or chain or cable, to impartrotation to said drum and said turret as will be hereinafter described.

On said chair are supported two cutter bars and a roller which operatesas a lower cutter member and also as a lower feed member. Said lowercutter members work in opposition to the upper reciprocatory cutter, E,which will be described farther on. On the chair, B is an outer,horizontal bearing, B, and an inner horizontal bearing, B in alinementwith the bearing, B In said bearings rests a. shaft, B", which projectsthrough the bearing, B nearly to the axial line of the lower turret, B.B is a roller surrounding the shaft, B, and fixed thereon. Said rollerreaches upward into position to bear against the lower face of thesheet, S, which is to be cut, and said roller extends near enough to theaxial line of the turret, B, to bring the roller close to the right-handface of the reciprocatory cutter, E, when the latter extends below thesheet, S.

The lower feed roller, B cuts in conjunction with the right-hand edge ofthe upper cutter, E, and the latter also cuts in conjunction with thecutter bars, D and D The upper part of the chair has an upright channel,D extending from the upper face downward and from the rear end of thechair forward nearly to the front end of the latter. At the front ofsaid channel, D is an upright wall, D.. At the rear of said channel is astandard, D". The width of the channel from left to right equals abouttwice the thickness of said roller, B From the channel, D a chamber, D,extends downward and 0 us through the lower face of said chair. helength of the cross section of said chamber-equals the diameter of theroller, B, and the width of the cross section of said chamber equals thethickness of said roller. In the form shown in the drawings, the bottomof the channel, D, is at the height of the axial line of the shaft, B,so that the lower half of the roller B is in the upper part of thechamber, in the right hand wall of the chamber, D, is an uprightchannel, D, extending from the channel, D entirely through the bottom ofthe chair.

Into the lower part of the channel, D is placed a foundation bar D, saidbar is only wide enough to fill the space in said channel at the left ofthe feed roller, B Above the channel, D", and in alinement therewith,the right hand face of the foundation bar, D, has an upright channel, Dopening through the upper and lower faces of the foundation bar. Thechannels, D and D are on a line which crosses the axial line ofthe driveshaft, B

Bolts, D are placed horizontally and at right angles to and at oppositesides of the foundation bar and-extend through the upright chair wallsand bear against the right side and the left side of the foundation barto secure the latter after it has been put into the desired position' Atthe front end ofthe bar, D, a set bolt, D extends horizontally throughthe chair wall, D in position to bear against the front end of said bar.Opposite the rear end of said bar is a set bolt, D ,which extendsthrough the rear standard, D and is directed toward and adapted to bearagainst the rear end of the bar, D. When said bar is to be positioned,it is placed into the channel, D in approximately its correct position.Then it is moved endwise by driving the bolt, D or the bolt. D forward,as may be needed to bring the channel, D of said bar into register withthe upright channel, D When that has been done, the opposite set bolt,is driven forward to make engagement with the end of the bar. Then thelateral bolts, D are driven forward to engage said bar.

On the foundation bar D, lie the two stationary cutter bars, D and D Thebar, D is at the right and the bar, D at the left.

. The bar, D, lies close to the roller, 13 and ter.

and working or cutting'edge of the bar, D, may cooperate with the frontedge of the reciprocatory cutter. The upper faceof the cutter bar, Dextends rearward far enough to adapt its ri ht hand edge to work withthe left hand e d Below its upper face, the bar, D, has a rearwardextension, d (Figs. 9, 14 and 16) which increases the support of saidbar on the foundation bar. At each side of the pair of cutter bars, Dand D is'a bearing plate, D Bolts, D extend horizontally through theside walls of the chair in position to bear against the plates, D andpress the latter against the cutting bars. Opposite the front end of thecutting bars, D and D a set bolt, D extends through the front wall, D,of the chair in position to be driven forward against said bars. Precisesetting of the bar, D is not needed, but the bar, D, must be set so asto bring its rear end accurately into position relative to the frontedge of the upper reciprocatory cutter. To accomplish this, the bar, D,is placed with its rear or working end a little forward of the channel,D the bolts, D being at the time retracted. Then the reciprocatorycutter is lowered to bring its cuttin%edges close to the upper level ofthe bars, and D Then the bolt, D is driven forward until the bar, D, hasbeen moved sufiiciently to bring its cutting edge into precise relationwith the reciprocatory cutter. When the bars, D and D are put intoposition prior to adjustment, they are placed far enough to the left tobring the right hand edge of the bar, D a little leftward of thechannel, D .After the bar, D, has been adjusted as above described, theleft hand bolts, D", are driven forward to bring the right hand edge ofthe bar, D into accurate relation with the left hand cutting edge of thereciprocatory bar, when the right hand set bolts, D, are driven forwardto press the right hand plate, D against the right hand face of thecutting bar, D. By this means, the two cutting bars, D and D and thebinding plates, D,

ge of the reciprocatory cuting the positions given them by driving thebolt, D, and the rear bolt, D forward.

The channel, D extends, leftward a little farther than the right handface of the cutting bar, D and slightly forward of the rear end of thecutting bar, D, in order that cuttings released from the sheet mayreadily fall through said channel. From the channel, D the cuttings.fall through the throat, D", and through the turret, B.

It will now be observed that the rear or working ends of the cuttingbars, D and D are substantially supported to resist heavy downwardpressure or blows, and that good provision is made for adjusting saidbars relcutter.

ative to the path of the upper reciprocatory The chair forms a firm seatfor the foundation bar. The working ends of the bars, D and D are seatedupon the foundation bar and are thus given the support of thewell-supported foundation bar. Thus there can be no downward flexing ofthe cutter bars. The foundation bar is to be made of a quality of metaladapted to be made hard, and it is to be specially treated for extremehardness, in order that it may not become battered by blows transmittedthrough the cutting bars, D and D. But when said bar becomes battered orchipped or broken to such extent as to make renewal desirable,

it may be removed and a new bar put into its place.

The base of the chair, B is cylindrical and axially in line with thehead, B

Above said base is a horizontal annular flange, B Between said flangeand the upper face of the bearing, A a gear and ratchet ring, Bsurrounds said base and rests upon the upper face of the bearing, A. Onthe upper face of said ring is a crown of bevel gear teeth, B meshingwith the small bevel gear wheel, B The ring, 13, is free to rotateindependently of the chair base and the head, B and the turning of saidring causes the latter to turn the smaller bevel gear wheel, B and theshaft, B, and the feed roller, B Said ring is to be 'ven a step-by-steprotation in order that t e feed roller may be turned step-by-step farenou h to carry the sheet, S, as far as may be esired every time theupright reciprocatory cutter rises above the sheet plane. The ring, B,is given its step-by-step rotation by means which will next bedescribed.

Below the crown, B, of gear teeth, the outer faceof the ring, B isprovided with ratchet teeth, B, which are to be engaged by a pawl, Gwhich is journaled on a stud, C rising from a horizontal arm, Cprojecting rearward from the pawl ring, C, which loosely surrounds thelower 'part of the gear ring, B and rests loosely on the upper face ofthe bearing, A On the pawl are two rightward-directed horizontal ears,50

C The left hand end of a reciprocatory bar, C extends between said earsand is coupled thereto by an upright in, C. At the left of the pawl, G alug, rises from the arm, C A bolt, C extends horizontally through saidlug and forms a stop for limiting the leftward movement of the pawl. Acushion, C", of leather or rubber or any similar material is shownplaced on the pawl in position to make contact with the inner end of thebolt, C The purpose of said cushion is to reduce shock when the .pawlmeets said bolt. Said bolt is to be so set as to allow the pawl to moveleftward only far enough to definitely disengage from the teeth, B ofthe ring, B", as will be described further At the ri ht of the chair, Bis a horizontal slide earin A, through which the bar, C, extends. t theright of said bearing, the end of said bar is coupled to one end of alink, (3 The opposite end of said link is coupled to the lower end of anupright rocking arm, C Said arm is pivoted on a horizontal stud, C rigidon the rear face of the body, A. The upper end of said arm bears aroller, C, which extends into a groove, G on a cam, C mounted immovablyon the shaft, H. Said groove has one leftward extension, whereby theroller, C and the upper end of the arm C, are moved leftward and thenimmediately rightward to normal position during each rotation of saidcam. The lower end of the arm, C is shown provided with an upright slot,C through which extends a bolt, C, which has a shoulder, C bearingagainst one side of the arm, C. At the opposite side of said arm, is anut, C. By tightening said nut, said bolt is bound to the arm, C Thelength of the bolt between the shoulder, C, and the head, C, of the boltis sufiicient to extend throu h and make a journal for the link, C. Whenthe nut, G has been loossued, the bolt, C", may be moved upward ordownward in the slot, C and the bolt then again tightened. Such movementvaries the length of the endwise reciprocation of the link, C and thebar, C and such variation of the movement of the bar, C varies thenumber of teeth over which the pawl, 0*

be fed or moved horizontally one step. That is accomplished by turningthe rin B, through the action of the pawl, C f during each reciprocationof the pawl the bar passes over only one tooth on the ring, B said ringwill be turned through a distance corresponding to the distance betweenthe points of two adjoining teeth. This fractional movement of said ringwill be transmitted through the small gear wheel, B and the shaft, B",to the lower feed roller, B If during each reciprocation the pawl ismoved over more than one tooth, the movement imparted to the feed wheelis correspondingly extended.

As above indicated, the link, C and the bar, C are thrown leftwardduring only a at their leftward limit, the pawl having lid movedleftward until it was stopped by, the.

"turned when the turret, B, is turned by the action of the belt on thedrum, B, as hereinafter described.

In order that the bar, Oimay always move the pawl, C before the arm, Ois moved, frictional resistance to the turning of the pawl ring may beapplied as will be next described. On the right of the pawl ring is ahorizontal extension, C The left hand end of a blade spring, C bearsagainst the lower face of said extension while the left hand end of asimilar spring, O bears against the upper face of said extension. Theright hand end of the spring, O rests on a-horizontal seat, A on thearm, A Between said blades and above said seat is a spacing block, C.Above said block a binding block, C rests on the spring, C A bindingscrew, O extends downward through said blocks and said springs into theseat, Afland bind said blocks and said springs firmly to the seat, A. Anadjusting bolt, O extends through both springs and bears a thumb nut, C.By tightening or loosening said bolt, the pressure of said springs uponthe extension, C may be varied, and such variation varies the powerrequired to turn the pawl ring. This resistance and the frictionalresistance offered by the engagement of the pawl ring with the ratchetring and the upper face of the hearing, A, must definitely exceedfrictional resistance to the turning of the pawl on the stud or journal,O Since it is desirable to make the turning of the pawl ring as easy aspossible, said ring is to be so seated as to make the least possiblefrictional engagement with the ratchet ring and the bearing, A,consistent with accurate movement. When that has been done, the desireddegree of resistance to the turning of the pawl ring may be attained byvaryin the pressure of the springs, C and upon the extension, C. It istobe observed that by making the springs bear upon the upper and lowerfaces of the extension, 0 the frictional engagement made by the pawlring with the ratchet ring an the bearing, A is to be less than would bethe case if pressure were applied to the pawl ring parallel to the axisof said ring.

With the ratchet ring is associated mechanism controlled by the operatorfor normally covering the ratchet teeth, B adjacent the pawl, C, so asto prevent the pawl from reaching the teeth to make engagement with thelatter during the reciprocation of the pawl. Between the pawl ring, C,and

the ratchetring, B there is a flat fender ring, B, which supports thefender, B, which rises from said ring and extends across a portion ofthe upright face of the ratchet ring. Normally said fender extendsbetween the ratchet ring and the edge of the pawl so that during thereciprocation of the pawl said edge slides on the outer face of saidfender. The fender ring is rotatable on the lower turret axisindependently of the pawl ring and the ratchet ring. On the front of thefender ring is an ear, B to which is attached one end of a wire, B

Said wire extends rightward to a guide roller, B journaled on the frontof the ma chine body. Said wire extends downward over said roller and isjoined to a pedal, B

By depressing said pedal, said wire is drawn endwise, whereby theforward Part of the fender ring is drawn rightward. This effects apartial rotation of said ring on the turret axis, whereby the fender, Bis carried leftward out of the path of the pawl. When the pedal is free,a contractin coiled spring 13 havingfone end attached to the ear, B andhaving the other end attached to an ear, A draws the fender ring to itsnormal osition. The ear, A is fixed on the bear1ng,'A To limit thismovement a yoke, B extends across the pedal, 13. lin adjusting screw, Bextends downward through said yoke in position to be met by the pedalduring the upward movement of the latter. Said pedal is stopped when. itmeets said screw. The range of the pedal is varied by varying the heightof the screw.

On the left hand end of the arm, A of the body, A, of the machine is an"upright bearing A", in which rests the upper turret G. A drum, G havinga bottom, G rests upon the upper end of the bearing, A and extendsacross the upper end of the turret and is secured to the latter by meansof up right, counter-sunk bolts, G extending through said bottom intothe turret. Thus the turret is free for rotation within said hearing,but it is held by the drum against downward movement.

At the left of the bearin A and above the drum, G is a housing, castintegral with the arm, A On the left of said housing is the uprightplate, G secured to the housing by bolts, G. In said plate is ahorizontal bearing, G", in axial alinement with the bearin ,aA Theshaft, H, rests in the bearing, i and has a neck, H extending throughthe bearing, G, and supporting a hand-wheel, H at the left of saidbearing.

On the upper edge of the drum, G is a bevel gear crown, G having up-warddirected teeth meshing with the teeth of a small bevel gear wheel, Gwhich is fixed on ahorizontal shaft, G rotatable in the hearing, G",which is stationary on the arm, A.

Said shaft is rotated at the will of the operator through mechanism tobe described further on. p v I On the axial line of the turret, G, is anupright bore, G extending through the turret'body'. In the upper part'ofsaid bore is an upright key way, G. In said bore is a cylindrical,reciprocatory cutter supporting'stem, G, on which is a stud, 9 extendininto said key-way to prevent the steni iiom rotating independently ofthe turret body.

The upper end of said stem, G extends upward above the turret, G, andthrough the drum G and into the coupling member, G, and there has acylindrical head, G resting rotatably in the cylindrical bearing, Gformed in the lower part of said coupling member. Above said head, thecoupling member, G has right and left and front and rear parallelupright walls, 9". Above the'head'G, a bearing member, G rests on thehorizontal faces g (Fig; 6), which surround the bearing, In said bearingmember rests a cross arm, G supported on the lower end of the pendulumor pitman, G, the ufier end of which surrounds the eccentric, whichforms a part of the shaft, H, within the housing, A; Two upper bearingmembers, G rest on the bearing member, G, at opposite sides of thepitman,- G A binding plate, G extends across the bearing member, G fiandthe walls, '9",- at each side of the pitman, and each of"said;bindiplates is secured to said walls by bolts, By'means ofthe couplingmember, G", and said bearing members, the stem, G, iscoupled to saidpitman' for up and down movement when the shaft, H, is rotated. Thelower part of the stem, G3, is guided by. the turret, G, for up and downmovement. The coupling member, G 7, is held to u i and down movement byengagementof't e walls, g", with the front and rear walls ofthe'housing, A

and byenga ement of theright hand face or the mem er, G", with the face,A,

formed on the arm, A and by engagementof the righthand end of the coupin -memberwith th'e'inner'face of the up ig t wall plate, G! In otherwords, the front and rear walls of the housing, the face, A", and

. the wall plate, G form a chamber which is -upright and rectangular inhorizontal cross section and wherein the coupling member,

hr", in confined for up-and'd n y reciprocation. I

It will now be seen that the up-and-down reclprocation ofthe cutterstem, G is effected by the rotation of the shaft, H, while the turningof said stem on its axis is effected by the rotation of the bevel gearwheel, G,- from which motion is transmitted to the bevel gear crown, Gwhich is formed on the drum, G,,wh1ch is bolted-to the turret,

.cutter.

G. G, may be reciprocated whether the turret is at rest or being turnedon its axis and regardless of the position into which the turret hasbeen turned if it is at rest; and that the as above described, ismounted on the neck, This wheel is to be used in this way.

H when artificial power is not being applied to the shaft, H, and itoisdesired to assemble and adjust the cutting members.

A. tubular cutter holder, E is applied to the lower end of the stem, theholder having a neck, E threaded into said stem. The stem, G is alsotubular from near the head, G downward to the upper end of the neck, EThe cutter, E, is slidable endwise in the holder, E and said stem whensaid cutter is not engaged by the horizontal taper pin, E extendingthrough the holder, 'E and ada ted to bear sidewise against the s afurther means for holding the cutter against endwise movement, slugs, Eare placed above the cutter to fill the space between the upper end ofthe cutter and the It is also to be. observed that the stem,

from the stem, and said slugs are made of variouslengths inorder that,by selection, the space abovethe cutter may be filled with slugs whenthe lower end of the cutter is at the desired elevation relative tothecutting members which are located below the sheet plane. I p

The, lower end of the cutter has an upright flat front face, e as wideas the out which is to be made. li'erpendicular to said face andparallel to each other are the side faces, 6 -At the lower ends of thesethree faces are cutting edges; The lower-end of the cutter is inclinedupward proceeding from the front face rearward, so that the frontcutting edge will make the first engagement with the sheet to be cutandso that the side cutting edges will be inclined and engage the sheetprogressivbly from the front rearward. The

. front cutting edge works in opposition to the rear edge of the lowercutter, D. The

left hand side cutting edge works in opposition to the lower cutter, DThe right hand side cutting edge works in opposition to the lowercombined feed and cutter wheel,

13 which-is associated with the lower cutter bars, D and D, as alreadydescribed.

. The turret body, G, also supports a presser which is a part of thefeed mechanism and cooperates with the feed roller, B in engaging themetal sheet, S, for shifting the latter durin the step-by-step turningof said roller. his presser and the parts associated therewith will nowbe described.

At one side of the bore, G, is an upright, cylindrical chamber, Gextending upward from the lower end of the'turret. Said chamber is shownas extending only a little way above the middle of the length of theturret. From the upper end of said chamber and in axial alinement withthe chamber a cylindrical bore G extends upward through the turret. Thepresser comprises a cylindrical stem, G a lower horizontal bearing, G,and a wheel or roller, G.

In the lower part of the bore, G", the stem, G is surrounded by asleeve, G said sleeve being threaded to said stem and being slidableendwise with the stem when the latter moves up and down. Between saidsleeve and the shoulder, G formed at the upper end of the chamber, G isan expanding coiled spring, G bearing against said shoulder and saidsleeve and tending to press the latter downward.

Threading said sleeve on the stem makes the sleeve adjustable endwise,whereby the action of the spring, G may be varied. The bore, G, is ofproper diameter to receive the stem, G slidably. The inner face of thebore, G has a longitudinal channel, G which receives a tongue, G formedon the stem. The engagement of said tongue in said groove preventsrotation while permitting reciprocation of the stem. .The upper end ofthe stem extends upward through the bottom, G of the drum, G and isthere associated with cam mechanism as will be described further on.

In the bearing, G formed on the lower end of the stem, G is a horizontalaxle, G. The wheel or roller, G is fixed on the end of said axle whichis adjacent the axial line of the two turrets. Said axle projectsthrough the opposite end of the bearing and there has a shoulder, G. Theprojecting end of the axle is threaded and receives a nut, G which bearsagainst said shoulder. Thus the axle is free for rotation when the wheelor roller, G is turned by contact with the upper face of the movingsheet. S.

As already described, the lower feed roller, B is also close to theaxial line of the two turretsin position to meet one of the faces of thereciprocatory' cutter when the latter moves downward below the sheet, S.The turrets are so turned relatively on the axial line as to bring thewheel, ,G, directly above the lower feed roller, 13 and, by

means to be described farther on, the two turrets are to be turned inunison, whereby the relative positions of the wheel, G and the roller,B, are maintained.

the common axis of the turret and the'cutter stem, the presser wheel, Gmoving in an orbital path which is concentric to said axis and whichorbital path maintains a uniform relation to the orbital path in whichthe roller, 13 is at the same time carried.

When the feed roller, B is turned a step by the partial rotation of theshaft, B, the feed roller and the wheel, G move the sheet, S,correspondingly. The direction of such movement will depend uponthedirection of rotation of the feed roller and the position of rollerand the wheel, G. in their orbital paths. 3

The roller, B and the wheel, G stand in an upright plane which istangential to said orbital paths and the moveinent imparted to thesheet. S, is parallel to said plane. Said plane changes position anddirection with the turning of the turrets.

Hence by turning the turrets any desired direction may be given to thefeed imparted.

to the sheet, S, by the joint action of the feed roller, B and thepresser wheel, G.

The drum, G and the drum, B already described as being attached to thelower end of the lower turret, B, are harnessed to each other forrotation in unison by means which will now be described.

On the front of the body, A, of the machine, at the right and at thelevel of the drum, G is a guide pulley, I mounted on an axis whichishorizontal and perpendicular to the front of the machine. Below thepulley, I and at the level of the drum, B,

crown, G The lower edge'of the lower pulley, I is on a level withthelower art of the drum, B", while the lower edge 0 the rear pulley, I, isat a level with the upper part of the drum, B..

Immediately at the right of the drum, B in a recess, A are a pair ofguide pulleys, I and I, each being on an upright axis and 'the formerbeing at the front and the latter at the rear of the upright, middlelongitudinal plane of the machine. The pulley, I is at the elevation ofthe lower half of the drum, B", and the pulley, I is at the elevation ofthe upper half of said drum. A strap, I has one end attached to the faceof the lower half of the drum, G Said strap is wound around the drum inthe proper direction to leave the drum at the front and

